Insight
Increased by: Mining and completeing quests.
Bonuses:
+Accuracy/Avoidability
Also, the button I didn’t talk about in our new inventory is open!

Yep, a magnifying glass is open for you! Kind of sucks because you have to get it to level 30 just so you can get the basic one (30 and under one).

Willpower (Will in KMS)
Increased by: Playing MapleStory for a long time without stopping (in other words, be ‘AFK’ if you want to level it up quickly), improving your profession skills, and doing party quests.
Bonuses:
+Weapon/Magic DEF
+HP
+Abnormal Status Resistance

Dilligence (typo, should be ‘diligence.’ Also, Craft in KMS)
Increased by: Creating stuff using your profession skills.
Bonuses:
+Scrolls’ success rate (at level 50, you get 5% more. So for example, a 60% scroll would be 65%. And yes, it does work on every scroll EXCEPT special scrolls).
+Chance of getting 2X Profession EXP (at level 50, 10%).